 /*******************************************************************************
  * Copyright (c) 2006 IBM Corporation and others.
  * All rights reserved. This program and the accompanying materials
  * are made available under the terms of the Eclipse Public License v1.0
  * which accompanies this distribution, and is available at
  * http://www.eclipse.org/legal/epl-v10.html
  *
  * Contributors:
  * IBM Corporation - initial API and implementation
  *******************************************************************************/
 package org.eclipse.ui.internal.cheatsheets.registry;

 import java.util.Map ;
 import java.util.TreeMap ;

 import org.eclipse.core.commands.IParameterValues;

 /**
  * Provides the parameter values for the open cheat sheet command.
  *
  * @since 3.2
  */
 public class CheatSheetParameterValues implements IParameterValues {

     public Map getParameterValues() {
         Map values = new TreeMap ();

         CheatSheetCollectionElement cheatSheetCollection = (CheatSheetCollectionElement) CheatSheetRegistryReader
                 .getInstance().getCheatSheets();
         populateValues(values, cheatSheetCollection);

         return values;
     }

     private void populateValues(Map values,
             CheatSheetCollectionElement cheatSheetCollection) {

         Object [] cheatsheets = cheatSheetCollection.getCheatSheets();
         for (int i = 0; i < cheatsheets.length; i++) {
             Object cheatsheet = cheatsheets[i];
             if (cheatsheet instanceof CheatSheetElement) {
                 CheatSheetElement element = (CheatSheetElement) cheatsheet;
                 values.put(element.getLabel(null), element.getID());
             }
         }

         Object [] children = cheatSheetCollection.getChildren();
         for (int i = 0; i < children.length; i++) {
             Object child = children[i];
             if (child instanceof CheatSheetCollectionElement) {
                 populateValues(values, (CheatSheetCollectionElement) child);
             }
         }
     }

 }

